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FURNAGB POR ROASTING COPPER AND QTHER 033s. No. 316.723. Patented Apr.28,1885.

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. Z-Sheets-Sheet 2. C. A. BARTSCH. FURNAGB POR RUASTING COPPER ANDvUTHBR DRES. No. 316,728. Patented Apr..28, 1885.

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FURNACE FOR` ROASTING COPPER AND OTHER ORES.

SPECIFICATION forming part of Letters Patent No. 316,723, April 28,Application filed January 5, 1885. (No muilcl.) I

.To all whom it may concern.-

Be it known that I, CHARLES A. BnETsCH,

- a citizen of the Empire of Germany, residing at Bridgeport, in thecounty of Fairfield and State of Connecticut, have invented certain newand useful Improvements in Furnaces for Roasting Copper and other Qres;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

Myinvention relates to furnaces for roasting copper and other ores, butis more especially intended as an improvement upon the constructionshown in Letters Patent granted to Peter Spence, N o. 248,521, October18, 1882, and has for its object to provide a device for use in this andsimilar furnaces, whereby the whole body of oremay b e exposed to theaction of the rakes used for stirring and distributing the same upon thefurnace-beds, or, in other words, to doaway with the dead-point at theend of the bed where the ore becomes piled out of reach of the rakes;and with these ends in view my invention consists in the details ofconstruction and combination of elements hereinafter fully explained,and then specifically designated by the claims.

In order that those skilledin the art to which my invention appertainsmay more fully understand its construction and operation, I will proceedto describe the same in detail, referring by letter to the accompanyingdrawings, forming a part of this specification, in which- Figure 1 isaside elevation of afurnace with a portion ofthe side broken away toshow my improvement, and Fig. 2 a plan view also showing my invention;Fig. 3, an enlarged view of a journaled scraper; Fig. 4, a verticalsection taken through a tier of rake-rods, and Fig. 5 a Central verticalsection through a tier of scraper-rods.

Similar letters denote like ures of the drawings.

A are rackbars which receive motion from the cog-wheeIsB (but one beingshown in the drawings) and impart it to the truck C. To this truck aresecured the rake-rods D,which extend inside the furnace and operate therakes. Between each alternate set of rakeparts in all iigrods I placetwoother rods, E, which also extend inside the furnace, but are notrigidly attached to the truck-frame. Their inner ends are bent downwardat right angles. On these rods E, I secure two tappcts, F F, by means ofsetscrews.

G are rakes which are secured to the ends of the rake-rods. and areprovided with rollers G', which latter travel on tracks G, as will beclearly seen at Fig. 2. Back ofthe rakes, and journaled in lslide-blocksH, which also run on tracks G, are Scrapers I, consisting of a metalplate, as shown at Fig. 3.

Attached to the rake-rods D near the rake are trips J, the use of whichwill be presently explained. Y

Secured to or formed integral with the rackbars A, at their outer ends,are collars or rings A', through which pass rods K, the outer ends ofwhich are secured to the truck M,simi lar in construction to the truckC. O11 these rods are secured tappets N N by means of set-screws O.

To the truck M are secured rods P, which enter the furnace on everyother floor or the floors which the rods E do not occupy. The innerendsof these rods are bent down at right angles in the same manner and forthe same purpose as the said rods E.

Q is a scraper constructed in the same manlner as the scraper I, andjournaled in like blocks, and to the rake-rods on the floors ou whichthese scrapers are are secured trips similar to the trips J, butpointing in the opposite direction, for the purpose ot' upsetting andbacking the scraper.

From the foregoing description the operation of my improvement will beobviously as follows: The wheels B being revolved will impartlongitudinal motion to the rackbars A, which will cause the truck C totravel backward or forward, as the case may be, carrying with it therake-rods D, butnot the scraperrods E. Vhen the truck is travelinginward, and has nearly finished its stroke, it will come in contact withthe tappet F on the rods E, and from that point to the completion of itsinward stroke will carry the saidscraperrods with it. The bent ends ofthe scraperrods when moved inward will come in contact with the scraperI and advance it along the floor, pushing before it any accumulation ofore to within reach of the rakes on their backward stroke, which isaccomplished by IOO ` canbe'no dead-point, since the ore can never areversing of the wheels B. A s the rakes l travel backward the trip Jcomes in contact with the lower edge of the scraper I and turns thelatter on its journals about oneeighth of a turn, and then carries itback to its original position, the rods E having been previouslyreturned by the truck-frame C striking against and moving the tappets E.The dead-point on each floor of the furnacethat is to say, the pointwhere the ore accumulates out of reach of the rake-is the end at whichthe ore enters the said ioor from the Hoor above, and as this takesplace at the opposite ends of the alternate iioors it is necessary toplace Scrapers at the opposite end of the furnace on the iioors notoccupied by the scraper I, and to operate them just reverse ofthe'latter, which is accomplished as follows:` When the truck C hasadvanced inward,the o re on'some of the floors will havebeen pushed intothe openings, while on others the ore is vpushed away from the openings,whence it is returned Within ther'eldof action of the .rakes by theScrapers, which areI operated bythe inward movement'of the truck M.In-'this' manner the ore'is' thoroughly raked back and'forth, while itwill be readily understood that there get back of the Scrapers.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-v l; In an ore-roasting furnace, thecombination,with the'reciprocating rakes, of independ- `ent Scrapersjournaled in4 sliding blocks, 'and r scraper-rods adapted to push saidscrapers forward, whereby the accumulated ore is placed within the fieldof operation of the rakes, substantially as set forth.

2. In an ore-roasting furnace, independent 4o scrapers journaled insliding blocks arranged on the floors of the furnace at the so-calleddead-points 7 thereof,beyond the field of the rakes, in combination withmeans for operating said Scrapers, substantially as shown and described.

3. In combination with the rakes of an oreroasting furnace, the slidingblocks having Scrapers journaled therein, trips secured to the rakes andadapted to upset the Scrapers, the scraper-rods provided with tappets,as described, the trucks, and means for imparting Vmotiontheretosubstantial1y as set forth.v

4. The combination of the rakes G, trips J, scrapers I Q, journaled insliding blocks H, trucks C, carrying rakerods D and scraperrodsE,tappets F and F,secured on the scraperrods, truck M, carrying rodsvl?,rods A, eX- tending inward fromv the sides of the truck C, rods K,extending inward from thetjruck Mand passing through collars A on therods A, and tappets N N', secured on rods K, Vsubstantially as and forthe purposes set forth and specified.

In testimony whereof I affix 'my' signature in presence of twowitnesses.'v

CHARLES A. BARTSCH.

Witnesses:

S48. WILLIAMsoN, WALLACE A. SMITH.

